Lamp holder



FIG. 1 is a perspective view of a lamp holder showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken line portions of FIGS. 6 and 7 are included to show unclaimedsubject matter only and form no part of the claimed design.

The ornamental design for a lamp holder, as shown and described.